GATE score is taken by various companies. From my knowledge other than Indian Oil Corporation(IOC), the companies taking GATE score are
1.Kalpakkam Atomic Power Station
2.Indian Space Research Organisation(ISRO)
3.Bhabha Atomic Research Center(BARC)
4.National Thermal Power Corporation(NTPC)
5.Indian Council of Agricultural Research(ICAR)
These companies will consider your Gate score and they will call you for further process if you are eligible.
All the best,